739fa74e68
Web-researched + adversarially-verified design for extending library.rs with more store providers: the LibraryProvider extension point, the two cross-cutting pieces (Windows interactive-session launch wiring + a layered artwork strategy), new LaunchSpec kinds, per-store enumeration/launch/art recipes with priority/effort/ confidence, a phased plan, and the verification corrections. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>